Deep-well pump.



R. C. PURCELL.

DEEP WELL PUMP. APPLIOATIONTILED ooT.29, 1907.

THE Nanms PETERS co'. wAsHmrcN, D. c.

ROBERT O. PRCELL, OF OAKLAND, CALIFORNIA.

DEEP-WELL PUMP.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application led October 29,1907. Serial No. $599,669.

It consists in the combination-of parts andv in details of construction, which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a vertical section of thelworking barrel of the a' paratus. Fig. 2 is a bottom plan view o the upper head. Fig. 3 shows a modilied form of valve.

It is the object of my invention to provide a conveniently arranged, double actin pump, which may be introduced into a we casing to any desired depth for use, and

' easily removed therefrom when required.

As shown in the drawings, A is an outside cylindrical shell of such diameter as to be capable of sliding withinrthe well casing, and 2V is the pumping barrel member, f within which the piston 3 is iitted with suitable packing rings 4.

5 is the piston or pump-rod extending upwardly through a stufIing-box 6 in the upper head of the pump, so as to form a tight joint; and as the pump isdouble-acting, I have shown small openings 7 into the top and bottom of the piston, these openings con.-l necting with the interior of the piston chamber and extending outwardly to the annular grooves in which the rings l are fitted.

The pressure caused by the reciprocation of the piston will be alternately transmitted to force the upper rings into a close iit with the inside of the pump cylinder when the piston is drawn upwardly, and in like manner the lower rings are caused to make a similar fit when the piston is depressed.

rIhe lower head 8 may be in the form of a cylindrical casting, having an exterior threaded portion at 9 upon which the outer shell A is screwed, so that its outer surface will be substantially liush with the lower part of the casting 8. The upper portion is reduced above the threadedportion 9 to lit the interior diameter of the shell A. Above this it is again reduced to form a shoulder, at 10, over'which the innerpump shell 2 is fitted. The upper end of the outer shell A is in like manner screwed upon the upper head casting 11, with the outer periphery of which the outer diameter of the shell is iiush; and the inner pump cylinder 2 is screwed upon the reduced portion of the lower part of the upper head, as shown at 12, thus locking these parts securely but' detachably together.

The lower head 8 is formed with two chambers. The chamber 13 has an opening in the bottom into which the inlet valve seat 14 isv screwed, or otherwise iixed. This valve seat" may be fitted either to receive a ball valve, as at 15, or, if desired, a suitably Yguided.flat-faced valve 15 may be substituted, `as plainly shown in Fig. 3. The other chamber 16 projects into the chamber 13, and its lower surface is above and to one side of the valve '15, so that the upper part of the chamber 13 lies substantially above the valve, and the projecting portion of the chamber 16 acts as a stop and guide for the valve 15, so that said valve, when opened by the inrush of fluid from below, will be allowed the proper lift, and at the same time it will be compelled to fall back upon the valve seat when the piston moves in the opposite direction, and the valve closes. The space between the bottom of the chamber 16 and the level of the valve seat 14 is such that the valve 15 cannot pass into that space, but Will be compelled to fall upon its seat when closing.

A removable valve seat 17 is fitted into the opening in the bottom of the'chamber 16, and a valve 18 is litted to rise and fall with relation to this seat. The chamber 16 has an ample vopening into the passage 19 which lies between the outer and inner shells A and 2, and the liquid which is drawn into the lower part of the apparatus through the valve opening 14, is forced upwardly through this annular passage 19 to a discharge o ening 20 through. the upper head 11. This upper head has within it a valve chamber 21 vwith a removably fitted valve seat or seats 22, through which communication is had r with that portion of the pump cylinder above the piston 3. These parts, shown in the vertical section, may represent a suHicient number of valve chambers 21 arranged segmentally within the head 11, to easily dispose of the water lifted by the piston in its upward movement, and the discharge from the chamber 2l ytaires place through the passage or passages 20, through which the water from the annular passage between the cylinders passes, and also the water iinpelled by the upward movement of the piston is discharged.

24 are valves closing upon the valve seats 20., and these valves, of which there will be as many as there are openings into the chamber 2l, will close when the piston 3 moves downwardly, and will be lifted by the upward pressure of the lluid on the upward movement of the piston. The upper wall of the chamber 2i may either be chainbeifed, as shown at 25, to serve as a guide to receive the valve 24, `if the latter be a ball valve, or it may be perforated so that it a 'flat valve is used the stein ciFA the valve will be suitably guided to allow the valve to litt and close. This pump is intended te be submerged, and the inlet in the space above the piston 3 is 'elliected through a passage 26, which opens upwardly and diagonally between the pistonrod 5 and the outer periphery ci" the head ll. As in the case ol the discharge openings, this passage may represent a plurality of such inlet openings, it' desired. lhe valve seat 27 is here 'shown as screwed into the opening which is threaded for the purpose, and the valve 28, here shown as a llat or puppet valve, closes against the ilat inner surface el the seat.

29 is a centrally disposed stem fixed in the seat, having a head, as at 30, and a spiral spring 3l is Vsulliciently compressed between this head and the valve 28. The valve being centrally perforated and sliding freely upon the stein 29 will compress the spring in opening to allow the admission ci lluid into the upper part of the puinp cylinder through the passage 26, and will be immediately closed by the spring and interior pressure when the pump piston rises.

The tapering sleeve 32 may be i'itted around the upper end of the upper head 1l, and serves to hold the parts in place within the well casing, at the saine time allowing the pump to be easily withdrawn altogeth, by pulling up on the plunger or piston-rod.

Having thus described my invention, what l lclaim and desire to secure by Letters latw ent is- 1. A pumping apparatus of the character described, having in combination concentric cylinders spaced apart to torni an interinodiate annular passage, heads at the upper and lower ends el the cylinders each ol said heads having its inner end vloi-ined with two diameters, one 'for each ot the. cylinders, said heads having chambers loi-ined. therein at each side of the center, an upwardly lil'ting valve in each of the chambers of the lower head, an upwardly opening valve in one ol the chambers of the upper head, a valve inv the other chamber oi" the upper head and opening inwardly to admit lluid into the inner cylinder above the piston, a piston operable in the inner cylinder, a piston rod by which the piston may be operated, and ineans tor securing the apparatus submerged within a well casing.

2. An improved "iLiuinpin-g` apparatus hav ing in combination concentric shells or cylinders of different lengths and spaced apart to 'torni an intermediate annular passage, a head at the lower end o'i the cylinders lornied. with two diameters te each ol' which one ol the cyliidei's is secured, said head haring an inwardly projecting portion lorniing a chainber at one side ot the center and separating the remaining portion oit the head into a seeoiid chamber, an upwardly li'lting valve in each ol.: said chambers one ot said chambers connecting with. the space between the eviindei's and the bottoni et the exi ension ol' the head being disposed in the range oil' nieveinent ci the valve egt the other elntniber so as to torni a stop therefor, an upper head having its inner portion provided with two diameters to which the upper ends ol the cylinders are secured, tid upper head having` a chainber at each side el its center and both connectine` with the space ahove the piston, a upwardly opening valve in one o'l the chainbers of the upper head, an inwardly opening spring-pressed valve in the other chamber ot the upper head, a screw threaded. valve seat 'fitting an opening leading into the. second chamber oi the upper head and against whii'h said valve seats, a piston operable in the inner cylinder, and a rod lor operating the piston.

ln testimony whereel l have hereunto set my hand in presence ci" two subscril)ing` witnesses.

litOBljlt'l (l. lU iii @El i i.

i/Vitnesses:

Lnwis Si. lilrrcnnniy, EDWIN lt. Tanna. 

